1. Architecture Engineering Department Mechanic & Structures Second Year
Salahaddin University- Erbil College of Engineering Architecture Engineering Department Mechanic & Structures 2nd Year  4 h/w – 6 Unites Dr. Ali Izzadin Marouf
Architecture Engineering Department Mechanic & Structures Second Year

2. Engineering Mechanics
Is essentially a study of effects of forces acting on bodies.
- Mechanics is that branch of physical science which considers the motion of bodies, with rest a special case of motion (external effect of system).
- When the force system acting on a body is balanced the system has no external effect on the body, the body is in equilibrium, and the problem is statics.
- When the force system has a resultant different from zero the body will by accelerated, and the problem is dynamics.
- If there is no internal effect the body will be rigid bodies – no real body is absolutely rigid.
- Some time the changes in shape of the body have a negligible effect and assumed a rigid bodies.
Architecture Engineering Department Mechanic & Structures Second Year

3. Architecture Engineering Department Mechanic & Structures Second Year
Forces
Architecture Engineering Department Mechanic & Structures Second Year

4. Architecture Engineering Department Mechanic & Structures Second Year

5. Architecture Engineering Department Mechanic & Structures Second Year

6. Architecture Engineering Department Mechanic & Structures Second Year

7. Architecture Engineering Department Mechanic & Structures Second Year
Free body diagram
Architecture Engineering Department Mechanic & Structures Second Year

8. Architecture Engineering Department Mechanic & Structures Second Year